Руководство Пользователя для Olympus c-755 ultra zoom

The frame in which you focus on a subject is different from the 
frame in which you lock the exposure.
g“AE LOCK - Locking the exposure” (P.82)
Fix the focus position.
g“AF LOCK – Locking the focus” (P.75)
Focus on the subject in the center of the frame.
g“AF MODE - Changing the focus range” (P.72)

Under certain types of conditions, the auto focus may not work properly. If this 
happens, focus on an object with high contrast at the same distance as the 
intended subject (focus lock), recompose your shot and then take the picture. 
If the subject has no vertical lines, hold the camera vertically and focus the 
camera using the focus lock function by pressing the shutter button halfway, 
then return the camera to the horizontal position while keeping the button 
pressed halfway and take the picture.
If the subject still cannot be focused on, use the manual focus. 

g “Manual 

Shutter button

The green lamp 
blinks.
The subject cannot be 
brought into focus.

Subject with low 
contrast

Subject with an 
extremely bright area 
in the center of the 
frame

Subject without 
vertical lines

Subjects at different 
distances

Fast-moving subject

The subject to be 
focused on is not in the 
center of the frame.

The green lamp lights, 
but the subject cannot 
be brought into focus.